Transcranial Bright Light Therapy in Seasonal Affective Disorder (SAD)

Inclusion Criteria: * patient has (according to the Diagnostic and Statistical Manual of Mental Disorders, fourth edition, text revision \[DSM-IV-TR\]) a Major depression, recurrent episode, seasonal pattern * Structured Interview Guide for the Hamilton Depression Rating Scale - Seasonal Affective Disorder Version Self Rating Version (SIGH-SAD-SR) score ≥ 16 * patient is over 18 years and under 66 years * patient can read and understand the subject information sheet * patient has signed the informed consent form * patient is not pregnant Exclusion Criteria: * patient has a lifetime psychotic disorder * patient has a bipolar disorder * patient has alcohol or some other substance use dependence or misuse * patient has some unstable somatic disorder * patient uses some psychotropic agencies * patient is, in the opinion of the investigator, unsuitable for any reason * patient is a member of the site personnel or their immediate families * patient has administered bright light therapy via ear canals during the current episode